@LAZYGLOBAL OFF.

function int {
    //
    // Truncate or round towards zero.
    //
    parameter n.
    
    if n < 0 return ceiling(n).
    return floor(n).
}


function atmosphere_exit_eta {
    //
    // Return the number of seconds until the vessel exists the atmosphere.
    //
    // The vdot gives us the magnitude of the orbital velocity vector in the UP direction because UP is a unit vector
    return (BODY:atm:height - ALTITUDE) / vdot(velocity:orbit, UP:vector).
}


function list_remove {
    //
    // Remove given element from a list.
    //
    parameter lst.
    parameter element.

    local i is 0.
    until lst:empty or i = lst:length {
        if lst[i] = element {
            lst:remove(i).
        } else {
            set i to i + 1.  // dont increment if we deleted an element since this index now contains a new one
        }
    }
}